M38B53M4-059FP datasheet(48/69 Pages) MITSUBISHI

Part #	M38B53M4-059FP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER????

PDF	69 Pages

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Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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48 / 69 page

MITSUBISHI MICROCOMPUTERS

38B5 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

PRELIMINAR

Notice:

This

is not

a final

specification.

Some

parametric

limits

are

subject

to change.

Pulse Width Modulation (PWM)

The 38B5 group has a PWM function with a 14-bit resolution. When

the oscillation frequency XIN is 4 MHz, the minimum resolution bit

width is 250 ns and the cycle period is 4096 µs. The PWM timing

generator supplies a PWM control signal based on a signal that is

the frequency of the XIN clock.

The explanation in the rest of this data sheet assumes XIN = 4 MHz.

1/2

XIN

(4MHz)

P87/PWM0

bit7

bit0

bit5

MSB

LSB

PWM

bit7

bit0

Data bus

XCIN

“1”

“0”

PWM register (high-order)

(address 001416)

PWM register (low-order)

(address 001516)

It is set to “1”

when write.

PWM latch (14-bit)

14-bit PWM circuit

When an internal

system clock

selection bit is set

to “0”

Timing

generating

unit for PWM

(64

µs cycle)

(4096

µs cycle)

P87/PWM output

selection bit

P87 direction

P87/PWM output

selection bit

P87 latch

Fig. 53 PWM Block Diagram

M38B53M4-059FP Datasheet(PDF) 48 Page - Mitsubishi Electric Semiconductor

M38B53M4-059FP Datasheet(HTML) 48 Page - Mitsubishi Electric Semiconductor

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